taylor



(No Model.)

3 Sheets-Sheet 1. H. H. TAYLOR. MACHINE FOR TAPPING RADIATOR LOOPS. No. 416,517.

Patented Dec. 3, 1889.

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H. H. TAYLOR. MACHINE FOR TAPPING RADIATOR LOOPS.

No. 416,517. Patented Dec. 3, 1889.

3 Sheets Sheet 3.

(No Model.)

TAYLOR. MACHINE FOR TAPPING RADIATOR LOOPS. No. 416,517.

Patented Dec. 3, 1889.

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' ing my invention.

UNITED STATES PATENT OEEicE IIARRISON H. TAYLOR, OF DETROIT, MICHIGAN, ASSIGNOR TO THE MICHI- GAN RADIATOR AND IRON MANUFACTURING COMPANY, OF SAME PLACE.

MACHINE FOR TAPPING RADIATOR-LOOPS.

SPECIFICATION forming part of Letters Patent No. 416,517, dated December 3, 1889.

Application filed February 16, 1889- Serial No. 300,204. (No model.)

To all whom it may concern:

Be it known that I, HARRISON H.-TAYL0R, a citizen of the United States, residing at Detroit, county of \Vayne, State of Michigan, have invented a certain new and useful Improvement in a Screw Tapping Machine; and I declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying 1drawings, which form a part of this specificaion.

My invention relates to an improved screwtapping machine, and has reference more particularly, although not exclusively, to such a machine for screw-tapping the hubs of radiator-loops, the machine being designed to tap the, hubs on both sides of the loops and at both ends thereof also, simultaneously, in an expeditious and satisfactory manner.

To this end my invention consists of thecombinations of devices and appliances hereinafter more fully described, and set forth in the claims, and herewith more fully illustrated in the accompanying drawings, in which Figure 1 is a view in perspective embody- Fig. 2 is a front elevation. Fig. 3 is a plan view. Fig. 4 is a sectional view illustrating features of my invention, and Fig. 5 is a detail view of a portion of the shifting mechanism.

I carry out my invention as follows:

A represents any suitable supporting frame, which may be provided withsupporting-beds A A the one preferably adjustable toward and from the other, so as to adapt the machine readily to tap the hubs of loops of different lengths simultaneously at both ends. To this end the frame A may be constructed with longitudinal recessed bed-pieces a a, the supporting-bed A having a tenoned engagement thereupon, as shown at a so that the bed A may be moved to and fro on the bed-pieces. This movement may be effected in any desired manner, and the bed A may have any other proper movable engagement on said bed-pieces. As shown, I accomplish the adjustment of the bed A by means of a screw'a suitably engaged with the said bed and frame.

B denotes the driving-shaft properly journaled to the supporting-beds A A and preferably provided with an idle-pulley b and driving-pulleys 1) b the belts Cand Cbeing arranged thereupon to advance the taps to their work and to retract the same when said belts are properly shifted. The driving-shaft is provided toward either end with drivinggears B B preferably worm-gears, and which mesh'wit-h gears D D upon laterally-extended shafts D j ournaled in each of the supportingbeds respectively, said shafts being provided with wide pinions or gears D D.

E E and E E denote the tap-spindles, arranged to receive the radiator-loop between their adjacent ends, and provided each with a suitable tap e. Said tap-spindles are each further provided with driving-gears E E respectively, meshing with the gears D D The tap-spindles have a lateral reciprocatory movement in-theirsupporting-beds, and which may be accomplished in any suit-able manner, preferably as follows: The tap-spindles are journaled in suitable bearings e 6 and also have a screw-threaded engagement with the bed, as shown at 6 in order that as the spindles rotate they will also be advanced or retracted, as the case maybe. The tap-spindles are provided with tightening-heads to hold the work in the manner described in my pending application for a tapping-machine filed August 8, 1888, Serial No. 282,275, said application being for a single machine to tap the hubs of a radiator-loop at only one end at a time, while my present application is designed to provide a double machine with variations of certain portions of the mechanism to tap the hubs at both ends of the loop at one and the same time. These tightening-heads are shown at 6*.

Any suitable shifting mechanism may be employed to reverse the motion of the tapspindles. That shown in the drawings consists of a shifting-bar F, suitably engaged with the driving-belts and provided with a retracting-sprin g F. At its forward end said bar is movably supported upon a guide-bracket G. Connected with the shifting-bar is a bellcrank lever] l, suit-ably engaged therewith an d with the supporting-bed, as upon posts h h. The opposite end of the bell-crank is suitably connected with a sliding rod I, movably connected with a supportirig-bracket I, and provided with an adjustable block 1*, so located as to form contact with the drivii'ig-gear of the tap-spindles. It will be obvious that as the said gear moves outward the sliding red I will be forced in the same direction, thereby throwing toward the front that end of the bell-crank lever connected with the shiftingbar, carrying forward with it the said bar until it has reached a point sufficient to stop the machine until the operator is ready for the taps to advance to their work, when he seizes the handle 1 of the shifting-bar and shifts the belt to drive the tap-spindles forward to drive the taps to their work. On the other hand, to automatically shift the belt to retract the taps from the work, I employ a lock J, suitably journaled on the supporting-bed, as shown, the upper end being provided with a set-screw j, to bear against the gear of the tap-spindle, the opposite end of said shaft being engaged with the shiftingbar F, which may be notched to receive it, as shown at f. A spring J may also be used to restore the outer end of the crank-arm to its normal position. By this mechanism it will be seen that as the tap-spindle advances to its work the gear pressing against the setscrew will gradually crowd over the crankarm and lift its opposite end out of engagement with the shifting-bar. At the same instant this is accomplished the retractingspring F will throw the said bar backward, changing the engagement of the belts and shifting the motion.

It will be evident that when the shifting-bar moves forward to the required position the lock J will be engaged therewith by the spring J The tightening-heads to one side the loop preferably have a screw-threaded engagement in the adjacent bearings, as shown in Fig. 4 at K, and also are provided with an operating-lever K and connecting-bar K so that both may be simultaneously rotated, as desired, to tighten upon the radiator-loop, and vice versa.

The taps extend through the tightening heads, respectively, said heads having a screw-threaded engagement in the adjacent bearings. It is evident that by means of the lever K connected therewith the head may be readily rotated to advance toward or retract from the work.

\Vhat I claim as my invention is- 1. In a screw-tapping machine, the combination, with a supporting-frame, of supporting-beds adjustable the one to the other upon said frame, and tap-spindles having a reciprocatory and rotatable engagement with said beds, substantially as described.

2. In a screwtapping machine, the combination, with the supporting-frame, of supporting-beds adjustable the one toward the other, and rotatable and reciprocatory tap-spindles located in each of said beds, said spindles provided with tightening-heads, substantially as set forth.

3. In a screw-tapping machine, the combination,with the su pportin g-f rame,of supportingbeds adjustable the one toward the other, rotatable and reciprocatory tap-spindles located in each of said beds, a driving shaft geared with said spindles, and a shifting device to reverse the movement of the spindles, substantially as set forth.

4. I11 a screw-tapping machine, the combination, with the supportingframe, of support ing-beds adjustable the one to the other, and a pair of rotatable tap-spindles journaled end to end in each of said beds, said spindles having a screw-threaded engagement with the beds, respectively, whereby they may be reciprocated, substantially as set forth.

5. In a screw-tapping machine, the combination of the supporting-frame, the supporting-beds adjustable the one to the other, the tap-spindles having a rotatable and reciprocatory engagement in said beds, and the drivingshaft provided with a worm geared with said spindles, substantially as set forth.

In testimony whereof I sign this specification in the presence of two witnesses.

HARRISON I'l. TAYLOR.

\Vitn esses:

N. WRIGHT, CHAS. II. SALow. 

